I can order some for next year.
Burgamot is a nectar source for so many of the Swallowtails.
I have planted Blazing Stars , Joe-Pye Weed and Zinnias in my native garden.
All are magnets for the Swallowtails.
Branhagen has been a wonderful book for me.
Not only are the photographs large and easy to identify from but he gives the host plants and the favorite nectar plants of each species. The range maps help too.